CN110560911B - Cigarette laser two-dimensional code burning and carving method - Google Patents
Cigarette laser two-dimensional code burning and carving method Download PDFInfo
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- CN110560911B CN110560911B CN201910781824.XA CN201910781824A CN110560911B CN 110560911 B CN110560911 B CN 110560911B CN 201910781824 A CN201910781824 A CN 201910781824A CN 110560911 B CN110560911 B CN 110560911B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/007—Marks, e.g. trade marks
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Abstract
The invention relates to a cigarette laser two-dimensional code burning method, which comprises the following steps: the laser burning device generates four prefabricated two-dimensional code templates; the laser burning device acquires the state information of the cigarette carton and calls a target two-dimensional code template corresponding to the state information; the laser burning device determines a code printing area on the cigarette based on the state information of the cigarette, and corrects the direction of the target two-dimensional code template to be matched with the code printing area of the cigarette; the laser burning device burns and etches in the code printing area to form a two-dimensional code based on the target two-dimensional code template after correcting the direction and the code printing information, the state of the main visible surface of the cigarette entering the burning area corresponding to the laser burning device is not required to be controlled specially, the workload can be reduced, and meanwhile, the direction of the target two-dimensional code template is corrected to be matched with the code printing area of the cigarette, so that the purpose of accurate burning and etching is achieved.
Description
Technical Field
The invention relates to the field of cigarette two-dimensional code burning, in particular to a cigarette laser two-dimensional code burning method.
Background
In order to ensure the safety of the cigarette in a special control sale link, related information needs to be formed on the main surface of a cigarette package, and a two-dimensional code with complete information needs to be formed through laser marking by a cold light source. For example, authorization information, associated information and anti-counterfeiting identification information, and clear, effective and non-erasable two-dimensional codes are used as carriers to form a security query measure for the cigarette. The information chain with traceability can be used as a basis, counterfeit products are effectively avoided, and the safety of cigarette carton products is really realized. At present, the queryable information link is formed in a high-tech laser burning mode, and the invention is mainly directed to a technology of using cold light source laser to shoot two-dimensional code full information.
The existing laser burning needs to manually control the state of the cigarette carton, all the cigarette cartons face the laser burning device with the same face, a large amount of manpower is consumed, and the two-dimensional code can be burnt at an incorrect position due to manual error placement.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a cigarette laser two-dimensional code burning method, a cigarette laser two-dimensional code burning device and a storage medium to solve at least one of the technical problems.
On one hand, the technical scheme for solving the technical problems is that the cigarette strip has four states to be burnt, namely an A-side character, an A-side reversed character, a B-side character and a B-side reversed character, and is in any one of the states to be burnt, and the method comprises the following steps:
s1: the laser burning device receives code printing information of the cigarettes output by the upper computer and generates four prefabricated two-dimensional code templates corresponding to the four to-be-burned states one by one;
s2: the laser burning device acquires the state information of the cigarette carton, and a target two-dimensional code template corresponding to the state information is called from all the prefabricated two-dimensional code templates;
s3: the laser burning device determines a code printing area on the cigarette based on the state information of the cigarette, and corrects the direction of the target two-dimensional code template to be matched with the code printing area of the cigarette;
s4: and the laser burning device burns and etches the target two-dimensional code template after the direction is corrected and the code printing information in the code printing area to form a two-dimensional code.
The invention has the beneficial effects that: the prefabricated two-dimensional code template is preset by corresponding to four possible states of the main visible surface of the cigarette, the laser burning device can determine the burning state of the cigarette by obtaining the state information of the cigarette, the target two-dimensional code template corresponding to the state information is called from all the prefabricated two-dimensional code templates, namely the target two-dimensional code template corresponding to the burning state of the cigarette is called, the direction of the prefabricated two-dimensional code template is corrected by comparing the obtained image of the main visible surface with the prefabricated two-dimensional code templates, and the purpose of accurate burning is achieved, so that the state of the main visible surface of the cigarette entering a burning area corresponding to the laser burning device is not required to be specially controlled, namely, when a large number of assembly line operations needing laser burning are carried out, the cigarette can be placed on a conveying platform at will, all cigarettes are not required to be controlled to be in one state, the workload can be reduced, and the problem of error burning positions in the prior art can be avoided; meanwhile, the direction of the target two-dimensional code template is corrected to be matched with the coding area of the cigarette carton, and the purpose of accurate burning is achieved.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the state information of the cigarette carton comprises bar code posture information and an image of the main visible surface.
Further, step S2 specifically includes:
the laser burning device acquires bar code posture information of the cigarette, and selects a first two-dimensional code template corresponding to the bar code posture information of the cigarette from all the prefabricated two-dimensional code templates according to the bar code posture information;
the laser burning device obtains an image of a main visible surface of the cigarette carton, and a second two-dimensional code template corresponding to the image of the main visible surface is selected from all the prefabricated two-dimensional code templates according to the image of the main visible surface;
and when the first two-dimension code template is the same as the second two-dimension code template, determining that the first two-dimension code template is a target two-dimension code template.
The beneficial effect of adopting the further scheme is that: the laser burning and carving device determines that the first two-dimensional code template is the target two-dimensional code template when the first two-dimensional code template selected through the bar code posture information is the same as the second two-dimensional code template selected through the image of the main visual surface, and can accurately select the two-dimensional code template corresponding to the burning and carving state through mutual evidence, so that the burning and carving accuracy is improved, and the code printing azimuth error is avoided.
Further, the laser burning device acquires the bar code posture information of the cigarette carton, and the bar code posture information of the cigarette carton is obtained by shooting or scanning four side vertical surfaces of the cigarette carton;
the laser burning device converts the bar code posture information into a posture function, and selects a first two-dimensional code template corresponding to the state information from all the prefabricated two-dimensional code templates according to a true value of the posture function;
and different truth values of the attitude function correspond to different prefabricated two-dimensional code templates.
The beneficial effect of adopting the further scheme is that: the position of the bar code of the cigarette can be determined by shooting or scanning the four side vertical faces of the cigarette, and the position of the bar code of the cigarette is unique and fixed on the cigarette, so that the burning state of the cigarette can be known by determining the position of the bar code, and then the first two-dimensional code template corresponding to the burning state is selected.
Further, the laser burning device acquires an image of the main visible surface, and the image of the main visible surface is obtained by shooting or scanning the main visible surface of the cigarette carton;
the laser burning device converts the image of the main visible surface into a visible surface function, and selects a second two-dimensional code template corresponding to the state information from all the prefabricated two-dimensional code templates according to the true value of the visible surface function;
and different truth values of the visual surface function correspond to different prefabricated two-dimensional code templates.
The beneficial effect of adopting the further scheme is that: the strip cigarette burning state can be known by shooting or scanning the main visual surface of the strip cigarette, and then the second two-dimensional code template corresponding to the burning state is selected.
Further, S3 includes:
the laser burning device selects a coding area in the image of the main visible surface;
the laser burning device compares the image boundary of the main visible surface with a standard boundary corresponding to the target two-dimensional code template to obtain a displacement deflection parameter;
and the laser burning device corrects the direction of the target two-dimensional code template according to the displacement deflection parameters so as to enable the target two-dimensional code template to be matched with the code printing area of the cigarette carton.
Further, S4 is preceded by:
s5: after the sensor detects that the strip cigarette enters a burning area corresponding to the laser burning device, triggering the laser burning device to start burning the two-dimensional code;
s4 is followed by:
s6: and the laser burning device transmits the code printing completion information to the upper computer.
Further, before S2, the method further includes:
s0: placing the cigarette carton on a conveying platform; the cigarette carton is conveyed to the burning area through the conveying platform.
In another aspect, the present invention provides a storage medium, where instructions are stored, and when the instructions are read by a computer, the instructions cause the computer to execute the above method for burning the two-dimensional laser code on the cigarette carton.
In another aspect, the invention provides a cigarette laser two-dimensional code burning device, which comprises:
a memory for storing a computer program;
and the processor is used for executing a computer program to realize the cigarette carton laser two-dimensional code burning method.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of one embodiment of the present invention;
FIG. 2 is a diagram illustrating a standard state of a standard boundary corresponding to a target two-dimensional code template and an image boundary standard state of a main visible surface;
3-4 illustrate displacement deflection parameters;
figure 5 shows the cigarette in four burn states.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the laser two-dimensional code burning method for the cigarette carton provided by the embodiment of the invention comprises four states to be burnt, namely a face-up word 1A, A, a face-down word 1B, B, a face-up word 2A and a face-down word 2B, wherein the cigarette carton is in any one of the states to be burnt, and comprises the following steps:
s1: the laser burning and carving device receives code printing information of the cigarettes output by the upper computer and generates four prefabricated two-dimensional code templates corresponding to four to-be-burnt and carved states one by one;
s2: the laser burning device acquires the state information of the cigarette carton, and calls a target two-dimensional code template corresponding to the state information from all prefabricated two-dimensional code templates;
s3: the laser burning device determines a code printing area on the cigarette based on the state information of the cigarette, and corrects the direction of the target two-dimensional code template to be matched with the code printing area of the cigarette;
s4: the laser burning device burns and carves in the area of beating the sign indicating number and forms the two-dimensional code based on target two-dimensional code template after revising the position and beating the sign indicating number information.
Specifically, the coding information of the cigarette carton comprises content information such as the brand, the production date, the quality guarantee period, the production site and the like of the cigarette carton.
The two-dimension code template comprises the size of the two-dimension code, the number of positioning points and the like.
The state information of the cigarette is obtained as information for determining the position and the posture of the cigarette, for example, the posture information of the cigarette and the photographed image of the main visible surface, and the state information can be used for knowing that the side of the cigarette facing the laser burning device is in one state of the A-surface character, the A-surface reversed character, the B-surface character and the B-surface reversed character, and determining the position relation relative to the laser burning device.
After the posture and the image of the cigarette are determined through the state information, when the image of the main visible surface of the cigarette deviates from the standard state, deviation parameters can be obtained through comparison, then the position of the two-dimensional code template is adjusted in a moving mode, the two-dimensional code template is located right above the code printing position of the main visible surface image, the boundary of the two-dimensional code template is in a matching state with the boundary of the main visible surface image, then the two-dimensional code is burnt and etched, the accurate code printing of the two-dimensional code at the code printing position is achieved, and all products in the same batch are guaranteed to be printed at the same position.
In particular, in some embodiments, the status information of the cigarette includes barcode pose information and an image of the primary viewing surface.
Step S2 specifically includes:
the laser burning device acquires bar code posture information of the cigarette, and selects a first two-dimensional code template corresponding to the bar code posture information of the cigarette from all prefabricated two-dimensional code templates according to the bar code posture information;
the laser burning device obtains an image of a main visible surface of the cigarette carton, and a second two-dimensional code template corresponding to the image of the main visible surface is selected from all prefabricated two-dimensional code templates according to the image of the main visible surface;
and when the first two-dimensional code template and the second two-dimensional code template are the same, determining that the first two-dimensional code template is the target two-dimensional code template.
When the first two-dimensional code template is different from the second two-dimensional code template, an error is reported, the laser burning and carving device does not carry out the burning and carving step, and the code is prevented from being marked at the wrong position.
In the above embodiment, the laser burning and carving device determines that the first two-dimensional code template is the target two-dimensional code template when the first two-dimensional code template selected through the bar code posture information is the same as the second two-dimensional code template selected through the image of the main visible surface, and the two-dimensional code template corresponding to the burning and carving state can be accurately selected through mutual evidence, so that the burning and carving accuracy is improved, and the code printing azimuth error is avoided.
Preferably, as another embodiment of the present invention, the embodiment specifically includes:
the laser burning device acquires bar code posture information of the cigarette carton, and the bar code posture information of the cigarette carton is obtained by shooting or scanning four side vertical surfaces of the cigarette carton;
the laser burning device converts the bar code posture information into a posture function, and selects a first two-dimensional code template corresponding to the state information from all prefabricated two-dimensional code templates according to the true value of the posture function;
and different truth values of the attitude function correspond to different prefabricated two-dimensional code templates.
The method specifically comprises the following steps:
the laser burning device acquires an image of the main visible surface, and the image of the main visible surface is obtained by shooting or scanning the main visible surface of the cigarette carton;
the laser burning device converts the image of the main visual surface into a visual surface function, and selects a second two-dimensional code template corresponding to the state information from all prefabricated two-dimensional code templates according to the true value of the visual surface function;
and different truth values of the visual surface function correspond to different prefabricated two-dimensional code templates.
The position of the bar code of the cigarette can be determined by shooting or scanning the four side vertical faces of the cigarette, and the position of the bar code of the cigarette is unique and fixed on the cigarette, so that the burning state of the cigarette can be known by determining the position of the bar code, and then the first two-dimensional code template corresponding to the burning state is selected.
The strip cigarette burning state can be known by shooting or scanning the main visual surface of the strip cigarette, and then the second two-dimensional code template corresponding to the burning state is selected.
Preferably, as another embodiment of the present invention, in this embodiment, S3 includes:
selecting a coding area in the image of the main visible surface by the laser burning device;
the laser burning device compares the image boundary 211 of the main visible surface with the standard boundary 212 corresponding to the target two-dimensional code template to obtain the displacement deflection parameters delta X, delta Y,
Wherein Δ X is the longitudinal deviation and Δ Y is the lateral deviation,
is an angular deflection;
and S33, correcting the orientation of the target two-dimensional code template by the laser burning device according to the displacement deflection parameters to enable the orientation to be matched with the coding area of the cigarette carton.
Preferably, as another embodiment of the present invention, in this embodiment, S4 further includes:
s5: after the sensor detects that the strip cigarette enters a burning area corresponding to the laser burning device, triggering the laser burning device to start burning the two-dimensional code;
s4 is followed by:
s6: and the laser burning device transmits the code printing completion information to the upper computer.
Preferably, as another embodiment of the present invention, in this embodiment, before S2, the method further includes:
s0: placing the cigarette carton on a conveying platform; the cigarette carton is conveyed to the burning area through the conveying platform.
Specifically, the main visual surface of the cigarette in this embodiment has four burning states: a face is positive, A face is negative, B face is positive and B face is negative.
The prefabricated two-dimensional code template forms 4 templates aiming at two main surfaces (A surface and B surface) of a cigarette, namely an A1(A surface positive character) prefabricated template and an A2(A surface negative character) prefabricated template of a visible surface A, and a B1(B surface positive character) prefabricated template and a B2(B surface negative character) prefabricated template of a visible surface B, and the prefabricated templates face the advancing front direction.
Specifically, the barcode information of the cigarette can be obtained by the cigarette barcode reading device, in this embodiment, the barcode posture information of four side faces of the cigarette is obtained by 6 barcode reading devices, and the barcode posture information captured by the 6 barcode reading devices is converted into a posture function f (N), and the posture functions f (N) N1, N2, N3, N4, N5, and N6 are all values, that is, 6 pieces of posture characteristic information of the cigarette {100000, 010000, 001000, 000100, 000010, 000001 }.
The effective values of the long vertical surfaces are [010000, 001000, 000100 and 000010] in a normal state, the cigarette bar codes are only endowed with the long sides or the short sides of the vertical surfaces of 4 cigarettes, the bar codes are usually arranged on the long vertical surfaces of the side vertical surfaces, and two bar code reading devices are respectively arranged on the two long vertical surfaces to capture the bar code posture information of the cigarettes.
The image of the main visual surface of the cigarette is captured by 1 video capture camera, and the visual surface function F (M) is formed by two visual images.
Visual surface function F (M) true value F (M) T10, T11, T20 and T21 cigarette has 4 main surface attitude feature information. Namely, the A1 true value T10 of the visible surface A is (A surface positive character), and the A2 true value T11 is (A surface negative character); the truth value B1 of the visible surface B, T20 (B surface positive character) and the truth value B2 of the visible surface B, T21 (B surface negative character) are defined, and the reference is based on the direction facing the forward direction of the travel.
The attitude function F (N) and the visual surface function F (M) determine the prefabricated template appointed by the function, and the calling relation is as follows:
f (N) true value [010000] corresponds to F (M) true value [ T10] corresponds to the prefabricated two-dimensional code template (A-face positive character);
f (N) the true value [001000] corresponds to F (M) the true value [ T11] corresponds to the prefabricated two-dimensional code template (A surface reverse character);
f (N) true value [000100] corresponds to F (M) true value [ T20] corresponds to the prefabricated two-dimensional code template (B-surface positive character);
f (N) true value [000010] corresponds to F (M) true value [ T21] corresponds to the prefabricated two-dimensional code template (B-surface reverse character);
as shown in fig. 2-4, the laser engraving device compares the image boundary of the main visible surface with the standard boundary corresponding to the target two-dimensional code template to obtain the displacement deflection parameters Δ X, Δ Y,
Wherein Δ X is the longitudinal deviation and Δ Y is the lateral deviation,
is an angular deflection.
True values of the associated modification function F (X Y phi) are the displacement DeltaX, DeltaY parameters, deflection
The laser burning device is adjusted according to a modification function F (X Y phi) and enables the cold light source laser burning device to carry out accurate burning.
The beneficial effect of this embodiment is: the prefabricated two-dimensional code template is preset by corresponding to four possible states of the main visible surface of the cigarette, the laser burning device can determine the burning state of the cigarette by obtaining the state information of the cigarette, the target two-dimensional code template corresponding to the state information is called from all the prefabricated two-dimensional code templates, namely the target two-dimensional code template corresponding to the burning state of the cigarette is called, the direction of the prefabricated two-dimensional code template is corrected by comparing the obtained image of the main visible surface with the prefabricated two-dimensional code templates, and the purpose of accurate burning is achieved, so that the state of the main visible surface of the cigarette entering a burning area corresponding to the laser burning device is not required to be specially controlled, namely, when a large number of assembly line operations needing laser burning are carried out, the cigarette can be placed on a conveying platform, and all cigarettes are not required to be controlled to be in one state at will, the workload can be reduced, and the problem of error burning positions in the prior art can be avoided; meanwhile, the direction of the target two-dimensional code template is corrected to be matched with the coding area of the cigarette carton, and the purpose of accurate burning and carving is achieved.
It is understood that some or all of the alternative embodiments described above may be included in some embodiments.
Example 2
A storage medium, wherein instructions are stored in the storage medium, and when the instructions are read by a computer, the instructions cause the computer to execute the cigarette carton laser two-dimensional code burning method according to any one of the embodiments.
Example 3
A cigarette laser two-dimensional code burning device includes:
a memory for storing a computer program;
and the processor is used for executing a computer program to realize the cigarette carton laser two-dimensional code burning method of any one embodiment.
In the description herein, reference to the terms "embodiment one," "embodiment two," "example," "specific example," or "some examples," etc., means that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A cigarette strip laser two-dimensional code burning method is characterized by comprising four states to be burnt, namely an A-side Chinese character, an A-side reversed character, a B-side Chinese character and a B-side reversed character, wherein the cigarette strip is in any one state to be burnt, and the method comprises the following steps:
s1: the laser burning device receives code printing information of the cigarettes output by the upper computer and generates four prefabricated two-dimensional code templates corresponding to the four to-be-burned states one by one;
s2: the laser burning device acquires the state information of the cigarette carton, and a target two-dimensional code template corresponding to the state information is called from all the prefabricated two-dimensional code templates;
step S2 specifically includes:
the laser burning device acquires bar code posture information of the cigarette, and selects a first two-dimensional code template corresponding to the bar code posture information of the cigarette from all the prefabricated two-dimensional code templates according to the bar code posture information;
the laser burning device obtains an image of a main visible surface of the cigarette carton, and a second two-dimensional code template corresponding to the image of the main visible surface is selected from all the prefabricated two-dimensional code templates according to the image of the main visible surface;
when the first two-dimensional code template and the second two-dimensional code template are the same, determining that the first two-dimensional code template is a target two-dimensional code template;
s3: the laser burning device determines a code printing area on the cigarette based on the state information of the cigarette, and corrects the direction of the target two-dimensional code template to be matched with the code printing area of the cigarette;
s4: and the laser burning device burns and etches the target two-dimensional code template after the direction is corrected and the code printing information in the code printing area to form a two-dimensional code.
2. The cigarette laser two-dimensional code burning method as claimed in claim 1, wherein the state information of the cigarette comprises bar code posture information and an image of the main visible surface.
3. The cigarette laser two-dimensional code burning method according to claim 2,
the laser burning device acquires the bar code posture information of the cigarette carton, and the bar code posture information of the cigarette carton is obtained by shooting or scanning four side vertical surfaces of the cigarette carton;
the laser burning device converts the bar code posture information into a posture function, and selects a first two-dimensional code template corresponding to the state information from all the prefabricated two-dimensional code templates according to a true value of the posture function;
and different truth values of the attitude function correspond to different prefabricated two-dimensional code templates.
4. The cigarette laser two-dimensional code burning method according to claim 2,
the laser burning device acquires an image of the main visible surface, and the image of the main visible surface is obtained by shooting or scanning the main visible surface of the cigarette carton;
the laser burning device converts the image of the main visible surface into a visible surface function, and selects a second two-dimensional code template corresponding to the state information from all the prefabricated two-dimensional code templates according to the true value of the visible surface function;
and different truth values of the visual surface function correspond to different prefabricated two-dimensional code templates.
5. The cigarette laser two-dimensional code burning method according to claim 3, wherein S3 includes:
the laser burning device selects a coding area in the image of the main visible surface;
the laser burning device compares the image boundary of the main visible surface with a standard boundary corresponding to the target two-dimensional code template to obtain a displacement deflection parameter;
and the laser burning device corrects the direction of the target two-dimensional code template according to the displacement deflection parameters so as to enable the target two-dimensional code template to be matched with the code printing area of the cigarette carton.
6. The cigarette laser two-dimensional code burning method according to any one of claims 1 to 5, wherein S4 is preceded by:
s5: after the sensor detects that the strip cigarette enters a burning area corresponding to the laser burning device, triggering the laser burning device to start burning the two-dimensional code;
s4 is followed by:
s6: and the laser burning device transmits the code printing completion information to the upper computer.
7. The cigarette laser two-dimensional code burning method according to claim 6, wherein before S2, the method further comprises:
s0: placing the cigarette carton on a conveying platform; the cigarette carton is conveyed to the burning area through the conveying platform.
8. A storage medium, wherein instructions are stored in the storage medium, and when the instructions are read by a computer, the instructions cause the computer to execute the cigarette laser two-dimensional code burning method according to any one of claims 1 to 7.
9. The utility model provides a device is etched to strip cigarette laser two-dimensional code burning, its characterized in that includes:
a memory for storing a computer program;
a processor for executing the computer program to realize the cigarette carton laser two-dimensional code burning method as set forth in any one of claims 1 to 7.
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| CN114101922A (en) * | 2021-12-06 | 2022-03-01 | 中能瑞通（北京）科技有限公司 | System and method for identifying electric energy metering device based on laser etching machine |
| CN114952021A (en) * | 2022-06-16 | 2022-08-30 | 广东依顿电子科技股份有限公司 | Manufacturing method of circuit board thermosetting ink two-dimensional code |
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